Cutting machine



D. N. JUDELSHON Dec. 28, 1948.

GUTTING MAcHIim 6 Shets-Sheet 1 Filed Jan. 21. 1947 u INVENTOR. nvm N.['ubeLsHoN BY neg 2s, 19481.

D. N. .JUDELSHON CUTTING MACHNE 6 sheets-sheet' 2 Filed Jan. 21, 194'?mmm" lflllhll INVENTOR.` DMW N. :Klum-.SHOM

ATTOR/VEYJ:`

Dec. 28, i948. D. N. JUDELsHoN 4575510 CUTTING MACHINE Filed Jan. 21.1.947 f e sheets-sheet 3 l e5. 4l

74. y as H5 E n INVENTOR. BY uw uasLsHqN MAL- A TTORNEYS D. N. JUDELSHONCUTTING MACHINE Dec. 28, 1948.

Filed Jan. 21., 1947 A JNVENTOR.

13mm Junusuow ATTORNEYS D. N. JUDELSHON CUTTING MACHINE 6 Sheets-Shea#l6 Filed Jan. 21, 1947 INVENTOR. :www JUDELSHON- AT TOR/VEYS machinespectivepositions in full lines and injbroken support which vspindle.

Patented Dec. 28, 1948 fnavia' N.Juaelshon,iirlgnidggiig; 1j; l`.amnicaemn January 21, 1947, serially@ 723,235 f My invention relatesto a newv and improved cuttingmachine, forcutting materials such ascloth, paper and the like. Y

" My, invention particularly; relates to cutting machines of thevtypewherein a4 spirally wound vroll of mass ofthe stock is vrotated around allongitudinal spindle Whichis iixed to the frame, vthe stock being thuskrotated by means of achuck which is rotatably mounted on1'said spindle.In

va machine of this type, a rotatable disc knife may be mounted Vupon ,aknife-head which is turnable on a shaft ,which connects said knife-'head to a knife-carriage vwhichis slidably mounted on longitudinal`rails 4or otherguides which'are parallelto the axis of the spindle.v

- .One object of my invention is-.toprovide irn-t proved means forrotating .the chuck; namely,

vby providing a speed-change mechanismffor the .`chuck-motor. n;

In many cases, it is desired to cutv the rolly of material or a partthereof, into a plurality. of slices of identical width. Another objectof my invention is 'to provide` an automatic vgagawhich `can be manuallyset eithery intogoperating or non-operating position, by the use-ofwhich it will -be unnecessary for the operator to make .aman- `ualadjustment of the knife-carriage` for each cutting .position thereof.Other objects of my invention are stated in .the following description`and ;drawings, which illustrate a preferred embodimentthereof.v I

- Fig'. l is a general front viewofthe improved The knife-carriage isshown-in two re lines. f l Fig. 2 is a side elevation, taken attheleftof Fig'. 1, showing the'knife-head in itsextreme non-operatingposition, in vwhich the knife isat its greatest distance from the stock.

Fig. 3 is a side elevation, taken lat the right ofFig. 1.

Fig. 4 is ay top plan-viewof the machine. y Fis. 5 is anelevation,partially infsection, o

Fig. e is a section annie une s-'-s ewig. 1.1;. v Fig. 7 is aperspective view ofthe automatic gage. Fig.' 8 is a section on the line8 8. of Fig. 7;'

Fig. 9 is a detailelevation ofthe releasable is vprovided at one -endfofA the '.Fig. 1'0 is aside view ofFig; 9., partiallyvbroken away. mi'i Fig. 5 shows .1a spirally wound rollorfmass of cloth or othermaterial I, which is-wound spirally inthe. usualzmannerf :upon ,acore-Sleeve la, which isfA made .of cardboard or other material which`canine easilycut. ,This core-sl'eeve I9 is mounted .turnably.,uponjafspindle 2, which is xed 4to the frame Fof the machine` Fig. 10vshowsthe .end-portion of spindle 2 .which is at l the left, of"1ig.,1,The yleft-enel por- .tionjsfplamped releasably in the forked end of anarmi 1, bymeanaQfiaxlamping Screw which preieraloly-loears;1,ipons1;iindle 2 slightly above its median'horizontal plane, so that spindle2 is iorceddownwardly `hy screw 6 against its seat in arm .1. Ihis'` armispivoted at8 vto a support or sections ofsaid roll I, Iwhich have beencut by the machine.

Rlefe'rringto Fig.;` 6, andwith the exception of -the very shortvcylindrical left lend-portion of said spindle' 2 .which is .x'e'd Atoarm'I, said spindle 2 `is'n o-cylindr'it':alup v.tothe `point '2a of Fig.6.

' Fig.V 5 shov Sjthat4 this non-cylindrical part of spird1efzhasja1pianaf race, 2p. The entire spindlev 2. may p9 non-#cylindrical to theleft of point `2a,`including the part of the spindle which isreleasablyclamped to arm 1. The cut is made ats'aid planar'facefwhilethe roll I and its core I9=are rotatgedlin, u1 nis o`r'1 and/While thedisc-knife is also rotated, so that 'the edge of the disc-knife To theright of point 2a,"thespi`ndle 2 is cylindrical; andfitha's' a reducedcylindrical extension '217,l Whose end-.portion is threaded.

, :Adjacent to-thepoint'Za of Fig. 6, the cylindrical part ofthe spindle-`2 ts snugly in a Washer '`r bushi'n`g I5, Which is fixed to rotatablechuck 3i Said chuck `3 audits bushing I5 rotate freely relative"`fto7spindle 2. I*AntiLfriction lbearings I6 `are!novided'fbettveen the'chuck 3 and extension 2b. A clamping nut 2c rigidly fixes the spindle 2to' the frame F of the machine.

Asfshownf'in detail in Fig. 6, the chuck 3 is providedwith a drive'pulley II,"Whose hub is reyleasalcily =f'xedtofsaid chuck 3 by means ofa cla'riip'ingscrew"lI8; .Aslshown inA Fig. 1, and in greater detail in"Figa 2,'the vertical plate of the chuck `llzisg".provided 'with .aseries of radial fpgrooves 5, -in whichirespective clamping dogs 4 r arelocated. Thesejdogs can be moved radially ,inwardly andoutwardly until.vtheir: points 4a z-,enter the. material` I., so as yto rotate the rollof 3 material and its coreV I9 in unison around the axis of spindle 2.These dogs 4 are fixed in holding position by conventional means.

The chuck 3 is rotated by means of a chuck motor 20. As shown in Fig. 1,the shaft of chuck motor is provided with a sprocket which is connectedby means of a chain 2|, to a corresponding sprocket on a shaft 22 whichis mounted turnably infthe frame".A This chuck-,motor 2| is fixed to theframe F. K

As shown in Fig. 3, a pulley 23 is fixed to shaft 22 and 26 arefrusto-conical and of,identical..taper1 The intermediate pulley has'two'frusth conical faces, Whose angle or`taper;.relative' toa; verticalplane, is identical' with the angle. or tapely. r`inner faces ofpulleys"y 211* The belts 24 and 'asin-atc"wedge-shaped 'cresssections;as4 indicated' in1b'rol-:Vex`zi` lines i'n '-Fi'g: 4, which shows one ofthe runs ofV eachs'aidfhelt 24 and 2s. AEach"-edgeofemissiebeitimakesuie 4same angle with the vertical plane, as thei'espec-[tive frus'to-conical facesof "pulleysy 21, 25,26, so 1 that eachedge"ci f"'each said belt-Wr'nakes fullcntact ,with the respective'abuttingv frusta-,conical face.` v

y As shown iny Fig. 4, shaft 28i's" rtatable Vin bearings, 30 andtl'.kBearing jhas'a pivot-arm 4300i which is turnably' mountedinffranjie-F,and

,4, atccthed sector 34 is fixed to framei. '.Afdetent-tooth is connectedby ,ifodl3'6`to ..a"fir 1'ger piece 31which ispivotally. connected'at'to bearingL Y, ,Y

ThebearingjZ-il can thusbe` adjustally 'fixed to sector` 34, asindicatedbythe full-lineA and. bro'-kenlinepositions,,ofbearing-v3|linzFigc. A f

The shaft 28 can thus: be raised and.` lowered relative topulleys23-andIII... v'

when shaft :eis mwered, the bottoni vportieri of driven beitlisalis.shifiedvltowaidsshaft,2a. thus decreasing the eifectivevdiameterfefythe respective pulley-pair 25-26.1- Due tothe wedge shape of drivenbelt .29, thisy slides' pulleyy 25 towards" Duly ley: 26; thusshifting-thetopiportion of thezdriving ibelt 24 away @from shaft28and-,increasing thefeffective diameter orthe:respective-:pulleypa-ir'zsf-z'n 1 The change in relativeeifectfive.f.diameterA bef -tween pulley pairs 27h-"25',y 25f-f26g5thusv. changesthe` speed ratio .of thedrive between pulleys 23- soA that the angularvelocity; oichuck: 3; can beadjustedfby raising and loweringmshaft.4 28.

The sliding movementofzpulley 25'5on shaftv28 4keeps the beltsi24and29taut'ati-allrtimeszi: 1.1 y -"I he disc-'knife'BS'iSfXedtOl a: shaft 40;which is rctatablyl= mounted2 ina: knife-@head2 42|?, which fis'iiiivotally1 lconnected-` to a 'lknife-carriage 42,

Awhich "is slidable hoiizontallyl-tb-and-fro inthe may be thedrivingpair {or'the' driven plane of Fig. 1, which is designated as thelongitudinal plane.

Fig. 5 shows the pivot shaft 43, which pivotally connects the head 4| tothe horizontally and longitudinally slidable carriageV 42. The shaft 43is freelyturnable relative to head 4|. The carriage 42 slides uponlongitudinal guide-rails 44 which are fixed to the frame of the machine.These rails, are locatedsin longitudinalrecesses of the carriage 42, Asovthat it;v cannon shift-transversely relative to the rails 44. Thelongitudinal position i of the carriage 42'may be adjusted by hand. ForFigmi shows a. shaft 28, to which pulleys 21 and 25 are fixed. The innerfaces of pulleys 12T this purpose, and as shown in Fig. 4, a handwhel45is releasably fixed to a transverse shaft llqwhichjsturnably mounted inthe carriage 42.

' A vg'ear 4'l'fi's fixed to the shaft 46. This gear 41 vknife 39 is notrotating. i

meshesz'withiaeornpanion gear which is xed to anshaft 4 9 which isparallel to shaft 46 and which i's also turnably mounted in the carriage42. vSprocketsviill are xed to shaft 49. These sprock- The shaft 40 ofthe knife-39 isprovidedwwith as'procket which mesheswith adrive'fschain"2 which i's-shownfiniBiasi-'152154, and-,5. 1-1 .uz-z This Vchaiiri I52'f meshes with:j awsprocketrwliich is 'iii'ied to shaft-43, so that"th'e'fvknif e 39 Vis rotated by fshaft-43`gwfliich loperates. 'as' aycountershaft. f As'shownl'in'Fig". 4, anA 'arm 'Uli-'is iixed to'cr-'riage 42;* Another arm 6 Ifiis'fixed at 62ft'ofarm 14.

if Asshcwri inffri'g ztsproeketss is connected by eccentricaiiypivoted"toi amV` s i.. :'Whenfarmrss 'is 'turned- "counterclockwiseffromitsi'fp'osition-'fof fFig: 4;"the clutch-member 56 iss'lid "on-'its studshaft by arm 58 towardsA clutch' member '527; thus `coupling the'friction 'clutch 56-51 and' rotating Vtur'ritn'e-head n. The arm wisprovided with a stop 13, to limit the counterclockwise turning vmovementvof 'ar1'n58l` f-The conventional spring,

'clutchei'nernber '56T yieldinglyin iuncoupled *pos-i'- actuated by`vex'tensifirr 63" also automaticall'ycontrois the 'circuit ofthechuckv-motor-Z andalso the circuit of knife-motor 55, so that therotation ofthe material-'or stck |1issto'ppedg Wher'itheThe:knifeiiieadfarifis manually: tumedi if tuve 'btbI shaft' 43',towards and awayzfnomthestdckLd.

"edffposition on rod`11, by a lock nut 19.

iri order to makethe" required seriesl of cuts by vinearxs'of the knife39. `.For thisfpurpose, and as shown in Fig.` 1 and Fig. 2, a rod 61i's'provided, which has ahand-hold 88.*" This rod" 61 is'xed'tltheknife` head4I. The knife head 4I- is prov ide'd with 'acounterweight B9, "softball it is normally biased to turn away from thestock I. This counterweight 59 also prevents thehead 4I from turning,whenshaftV 43 is -rotated. This weight 69 is adjustably fixed toanextension 4Ia of the head 4I. The usual knife vshield 1l) is alsofixed tothe extension 4Ia. As showninFig. 2, a sing'lebolt 1I fixes theshiel`d`1iland the extension-Manto thehea'd 4I. Alga-ge 12 is xed toanv-extensi'ona ofthe arm 61.-v` f "'"Bymeans of this gage,th'eopera'tor can manually fnieasure `theflongitudinal distance betweensccessive'cuts I l "'A-'gage is provided for manually shifting theknife-carriagev 42 ina serie'sjof :equal strokes, in`-order tocut thestock I into slices Aof vequal Width. l I. ,Y f "i Fig. '7showsthatengage-carriage 15 is'movably associated with theknife-carriage 42. Respective andy equal tension springs 16"and 16alongitudinally-urgethe gage-carriage 15 towards the knifecarriage 42.`The n'ds'of each saidspring are respectively fixed to the carriages 42and 15.

The rod 11. extends through'a bore of gagecarriage 15. Said bore is-locatedfclose to the respective end of gage-carriage 15. The diameterof the rod 11 is lessthanfthe diameter ofthe bore of carriage 15. AsaneX'a'mple, if thediameter o'f-said bore isv 0.75 inch', the'diameterofrod 11 is about 0.62 inch. As shown in Fig. '7, the gage- Acarriage 15has a' vertical recessfinto 4which the 'carriage 15 has a," limitedrocking movement aroun'd a-vertical axis, relative t0 the respective AAgage-nutA 18 is adjustably fixed to rod 11. vSaid gage-nut 18'isreleasably locked in its' adjust- A scale 88' is' fixed toknife-carriage42, and an index or pointer 88a is xed to gage-carriage 15. f

Fig. 7 shows a part of the knife head 4I, which is provided withanintegral pin 84. abuts a rod 85 which-is located in a helical spring83.*On'e'fend of saidhelical spring 83 is fixed to-the pin 84. II'he'other end of said helical spring '83 is xed `to theresp'ective `end. ofan #angular 'frod 82.

The rods 85 .and 82'arfe notxed't'o'each other.' There is alsmall spacebetween the adja- -cent ends 'of rods 85v and 82'. Therod 85 mayormayino't beflxed topin84. When theturnable head -4I` is moved in thedirection of the `arrow '8| away from thel stock/'I to its non-operative"position, the pin 84 abuts the rod 85, so that rod 85 pushes rod 82,'thus`turningthe rod-82 clockwise as indicated' by the arrow 82a in- Fig.A'1.

When the'head V4I 'is turned towards the stock laway from the rod 82',ina direction reverse to the directionof arrow 8l, the tension spring 83correspondingly turns the angular rod 82 counterclockwise. The angularrod 82 is 'fixed rigidly Vin the ybore of a head or collar 86 which isturnable about a vertical axis. As shown in Fig. 8, said'head `orvcollar 86 is xedby a set screw' 81-to' a vertical shaft 88.*which hasan integral collar 89. ".'Fig 8 shows the shaft 88 in its down or onposition, in which said collar 89 abuts a bushing 99, Awhich is fixed tothe gage-carriage 15."4 Below lthis bushing' 90,v .the shaft 88 isprovided with respective` superposed grooves 9i and 92. At itsbottomfthe shaft 88 is provided with a clampin-g eccentric 93. Belowsaideccentric 93, the reduced end ofthe 'shaft 88 extendsbelow thegage-carriage 15. A stop 94 is xed to the bottom end of the shaft 88, inorder to prevent the shaft 88 from being pulled upwardly out of thegage-carriage 15. A strip of friction material 95 is fixed to thegage-carriage 15. When the eccentric 93 is in the operating or vclampingposition shown in Fig. 8, the gagecarriage 15 isA temporarilyfrictionally held to the respective rail 44, by the friction clampingstrip 95 andeccentric 93. The eccentric 93 is turned to clampingposition by pin 84 and rods 85 and 82, when knife head 4I is turned awayfrom lthe stock.- When knife head 4I is turned towards the `stock,` thetension spring 83 turns eccentric 93 to non-clamping position. y

When the shaft 88 is' pulled upwardly by hand toits up position, theautomatic gaging mechanism fdoes notoperate. The spring-pressedjandturnable 4ball detent 95 lthen engages the lower groove 92 instead ofengaging the upper groove 9'I, so that the eccentric 93 is heldfabovethe friction clamping strip 95. k

If the operator wishes to cutthe stock into a series of slices ofidentical width, he sets the nut 1 8, until'the pointer 80a of thegage-carriage 151s alined with the corresponding scale-marking of scale80, when gage-carriage 15 abuts the nut 18,4 as in the position of Fig.7. The operator then pushes the shaft as to its down position of Fig. 8.s

As later described, the knife-carriage 42 is pro- .vided with automaticclamping or holding mecha- .nsm which r'elea'sably holds saidknife-carriage `42 to the rails 44.

When the knife head 4I is in extreme non- 'cperating positiomwhich isshown in Fig. 2, the

knife-carriage 42 is released fromthe rails 44.

As the knife head 4I is turned to operating posi- 'tion to make therespective cut, the `knife-carriage 42 is clamped to rails 44, beforethe knife 39 touches the stock I.

At the time when the knife-carriage 42 is in position for making thefirst cut, the gage-carriage 15 abuts the knife-carriage 42 and saidgagecarriage 15 is' spaced from nut 18, and the springs .land 16aare'under tension. The operator then turns the knife head 4I towards thestockl I. He

thus automatically clamps the knife-carriage 42 to the rails 44, and`hethen automatically closes the circuits of the knife-motor 55 and thegrindermotor 65 andthe chuck-motor 20, before the knife 39 touches thestock I.

`Asthe knife head 4I is thus turned towards the "stock I, the tensionspring 83 turns the clamping `knife 39 has been moved out of contactwith the stock. VAfter the knife head 4I has been moved a short distanceaway from the stock, the pin 84- androds. and `82l begin to turn theshaft 88 clockwise in the directionof arrow 82a, thus turning theclamping eccentric 93 into its clamping position. The gage-carriage 15isthus tems porarily xed tothe respective rail 44, before the r45`knife-'carriage 42 is released from the rails 44.

- .fWh'rle-the knjiie head .4| isain .the-extreme non-l operatingposition :f,Fig..2', theoperator lslides the temporarily releasedknife-carriage 42 aww-,from .the vtemporarily.-iixed gage-carriagefi,until the gage-nut 18 abuts thegajge-carliagge '15.` Thegagecarriage 15is lclamped to ra single `face of the respective rail I44,121.15 apoint`Whichis very close tos-pring v16a. .and which, is substantiallyAtransverselyespacedgfrom; spring `it. The spring 16a androd; ill arelocated.v very,1 `close tothe respgectivev end '|5f `of gagescarriage15. Hence, `fvvl-lejn-the knifle-carriage 42 isA slid avvayr from the`.teIVnpo-rarily xed gage-carriage T5, -thefspring 16o. will slightlyturn thel gage-carriagel-S relative yto itsassociated rail 4,4, so astobind fthe. -gagef- .carriage l uponsaidgassociatedrail 44, thusen-`suri-ng a positive and reliable.holdingaction -upon the gage-carriagel5, Without` bindingthe gage- .carriage 'l5 to the rod Tl. y

operator turns lthe knife head`4| into operating .position towards thestock l to make thesec'ond cutthus automatica'dl'y turning rod 82 byvtension spring '85 to 'release thev gage-carriage 15 while the.knife-carriage@ lremains temporarily xed,. so fth'atftheequaltensionspring's 16 and 16a movethe .gage-carriage 'I5 into contact withthe knife-carriageV 42, .without binding on the rail'44. These'operations are repeated, to make any desired number of' cutsof equalwidth.` V When rthe shaft 88 is held in its "up position, the rod 82 isturned back and forth, Without clamping the gage-carriage 15, becausethe eccentriol 93 isheldabove the friction strip 95.

When the shaft` 88 is thus pulled to its "up position, the rod 82 israised above rod 85. If desired, 4the rod. 85 and spring 83 maybetemfporarily removed, if rod 85 is not ixed tovpin 84. jlAs.previously noted, I automatically clamp' the knife-carriage 42 to arail or rails 44, while the knife SBfisbeing moved to cutting positionand the carriage. 42is' held temporarily in xed'position while therespective cutis .being made. y

, For.. this purpose, and as shown in Fig. 5, the

.f l., .the knife-.carriage 42 has thus been shiftdintolposition formakingtheseeond cut, the

knife head 4| Vhas a bottom extension 91, 'in which l Aafcyliitidricalroll 98Uis rotatably mounted. This Arollwflilflias a smooth periphery.yThis roll 98rides onthe'cam track 99 of a clamp member 00 which 'ispivotally connected at |0| .tothe :knife-carriage .42'. This clampmember |00 has a nut |02 ad-- justablyxed thereto. This nut yI 02 bearsagainst a corresponding clamp vmember |03, Which is piV- ptedfat |.04ato the knife-carriage 42.v Hence, 'ivhen the knife head y4| andlthev-knife 39'are Hmoved in ,unison towards the stock, the clamp memb'er|00 is operated so that its adjustable nut |;l!4 [pushesl a pin |05which is slidable in a slidey'bearing of knifefcarriage 42. This pin |05pushes a friction clamp-strip |06 which is provided ina Ir'eces'sllofVAknife-carriage 42, so as to clamp the jknife-c'arriage 42 against therespective rail.` 44. companion member' |03 operates. ,similar"clamping: mechanism.

, fAsshovvnin Fig. 5, ,companion stops |0'|. an'd y |08arerespectivelyfixed to the1 knifehead 4 I'and yto, thefknife-carriage 42. The stopslimit .the movement of the knife head 4| and its knife 39 towards thestock. n The stop |08 is adjustable.

Asalso shown in Fig. 5, a post |09 is fixed to,

fthe knife-carriage 42. .A rod. I0 is rigidly fixed to Atl`1el ?st.|09.l Ahelical compression spring lll, is "mounted-upon the rod H0, andthe endfof4 the nspring. textends slightly beyondr the rod |10. 'Wh'en.theoperator turns'the head 4|- avvayjfro'm thestock, this free-part ofthe .compression spring vIrl acts as a resilient stop. Fig. 5 shows theknife head4| in its extreme non-operating position.

Fig. 2*'shows .the cable C which extends .from the switchbox Y64a to oneof thev terminals of thechuck-motor 20..4 There is a supplementalgrinder H2 whichremoves the burr which is formed by the main grinderWheelli. y As show n in fFig., 3, this 'supplemental grinderv I |2 ismountedzin abracket |I-3, which is turnably connected atv jH4 tolcarriage 42. Y

` As shown in Fig. 2, .the grinder motor 65 is mounted on a block H5which is adjustable in a .direction perpendicular to the plane` of Fig.y2, relative to the block H6. `The block H5 is thus adjusted, relativetothe-block H5, byrotating the hand -Whjeel `H'Lwhich .operates a convenutional adjusting screw. The block isy adinstable in andirection parallelto the planeof Fig.,2,.,relati-ve to the block H8, this yadjustmentbeing Y,made :by the `vhand wheel ||`9 which4 0p.- erates a conventionaladjusting screw.

I.'Ilieblock l|8. is turnable aroundL a vertical axis relative to the'knife-carriage .42. y l

This mounting-of the grinder motorperrnits yaccurate adjustment of thegrinder wheel. 06. Fig.'-1.shows a switchv box |20; which has aconventional reversing vswitch for Areversing. the .direction ofrotationof the chuckmotor 20. Thisreversingswitch, not showmis operatedby handle |2|.` A l I have described a'preferred embodiment of myinvention, but numerous changes, omissions and additions can be made"Without departing from its` scope.

Y Thus, the knife motor can be controlled by an Aordinary switch,so thatthe `operation of-:the knife motor-,55l is independent of the position.of .thefkni-fe head 4| relative tothe stock.

llumerous-l other modifications are included within' the scope .of theinvention. In this em.- bodiment, the mass of stock is a spirally woundroll, but the machine can operate .upon any mass of material. Thegagecarriage 15- may also be designated as -a stop-carriage, because itstops thesliding movement of the knife-carriage 42. f

I claimri l. Ina' cutting machineo'f the type" which has a fra-me and inwhich a rotating 'massl ofstock is lcut/by a knife, a straight spindlefor rrotatably supporting said mass of stock, said' spindle' `beingfixed to said frame, .a chuck which isl rotatably mounted on saidspindle, saidy .chuck .having .means ,for engaging and'rotating sai'dmass; a driven pulley fixed tosaidv chuck, adriven pulley mounted `on adrive shaft, a countershaft which isl-located vin labearing which ispivotally corrnected to` said frame by al pivot member which is loca-tedbelow said countershaft, .said driven pulley being located above saidcountershaft and saidv countershaft` being located above said drivenpulley,said=countershaft having two outer pulleys fixed thereto and.having. an intermediate pulley 4 slidable thereon,.said. three pulleyshaving adjacent frustoconical. faces which. have the same angle, a drivebelt which connects said drive pulley to .one .of said outer pulleys andto said intermediate pulley, adriven belt which., connects said drivenpulley to the other ofA said outer pulleys andto said intermediatepulley,.sai:l belts having Wedgefshaped cross-,sections andv having4side faces which contact with the respective frustaconicalfacesofsaid'pulleys on said countershaft 2. A cutting. lmachine of thetype in which. a

rotating mass of stock cut by a knife, said machine having a frame,supporting means for supporting said mass to rotate relative to saidframe around a selected axis, mass-rotating means adapted to rotate saidmass relative to said frame around said selected axis, a knife-carriage,guide means for guiding said knife-carriage to move in a directionparallel to said selected axis, a rotatable shaft mounted in saidknifecarriage, the axis of said rotatable shaft being parallel to saidselected axis, a knife head pivoted on said rotatable shaft, saidrotatable shaft being freely rotatable relative to said knife head, aclutch member fixed to said rotatable shaft, a supplemental shaftmounted on. said knifecarriage and alined with said rotatable shaft, asupplemental clutch member mounted on said supplemental shaft andslidable on said supplemental shaft to slide towards and away from saidfirst-mentioned clutch-member, manually operated control means forcoupling said clutchmembers, a disc-knife fixed to a knife-shaft whichis mounted in said knife head, a knifemotor fixed to said knife carriageand connected by respective connecting means to said supplemental clutchmember, said rotatable shaft being connected by respective connectingmeans to said knife shaft.

3. A cutting machine according to claim 2, said machine having amass-rotating motor for operating said mass rotating means, agrindermotor connected to said knife head, a grinderwheel operated bysaid grinder-motor, and switch-means for controlling the circuit of saidgrinder-motor and said mass-rotating motor, and means operated by saidmanually operated control means for operating said switch means to closesaid circuits while said knife `head is moved in unison with said knifeto operating cutting position and to open said circuits While said knifehead is moved in unison with said knife to non-operatingnon-cutting-position.

4. A cutting machine which has a frame, a knife-carriage which ismovable to-and-fro relative to said frame in a selected path, a knifehead pivoted to said knife-carriage, a knife mounted on said knife head,holding means movably connected to said knife-carriage and adaptedreleasably to hold said knife-carriage to said frame when said holdingmeans are in operating position, said holding means being movable to anon-operating position to release said knife-carriage from said frame,said holding means being operatively connected to said knife head, saidknife head moving said holding means to operating position when saidknife Ahead is moved towards cutting position; guide means for guidingsaid knife-carriage to move in said selected path.

5. A cutting machine which has a frame and a support for the materialwhich is to be cut, a knife-carriage which is movable to-and-frorelative to said frame in a selected path, knife-carriage guide meansfor guiding said knife-carriage to move in said selected path, a knifehead pivoted to said knife-carriage, a knife mounted in said knife head,a gage-carriage slidable on respective gage-carriage guide-meansrelative to said frame in said selected path and also slidable towardsand away from said knife-carriage in said selected path, a stop xed tosaid knifecarriage, said stop being located to abut said gage-carriageto limit the movement of said knife-carriage away from saidgage-carriage,

10 and gage-carriage holding-means for holding said gage-carriagereleasably fixed to said frame. 6. A cutting machine according to claim5, in which said gage-carriage holding means are operatively connectedto said knife head to be moved into holding position when said knivehead is moved away from said support and to be moved into releaseposition when said knife head is moved towards said support.

7. A cutting machine according to claim 5, in which said gage-carriageholding means are operatively connected to said knife head to be movedinto holding position when said knife is moved away from said supportand to be moved into release position when said knife head is movedtowards said support, said machine also having knife-carriage holdingmeans for holding said knife-carriage releasably to said frame, saidknife-carriage holding means being operatively connected to said knifehead to be moved into holding position when said knife head is movedtowards said support and to be moved into release position when saidknife head is moved away from said support.

8. A cutting machine according to claim 5, in which said gage-carriageholding means are operatively connected to said knife head to be movedinto holding position when said knife head is moved away from saidsupport and to be moved into release position when said knife head ismoved towards said support, said machine also having knife-carriage`holding means for holding said knife-carriage releasably to said frame,said knife-carriage holding means being operatively connected to saidknife head to be moved into holding position when said knife head ismoved towards said support and to be moved into release position whensaid knife head is moved away from said support, and spring means urgingsaid gage-carriage towards said knifecarriage.

9. A cutting machine according to claim 5, in which said gage-carriageholding `means are operatively connected to said knife head to be movedinto holding position when said knife head is moved away from saidsupport and to be moved into release position when said knife head ismoved towards said support, said gage-carriage guide-means being asingle guide-member which is located and which fits loosely in anupstanding recess of said gage-carriage, said gage carriage having alimited turning movement around a vertical axis relative to said singleguidemember, said gage-carriage holding means being friction means whichare located and operative at only a single face of said recess, and atension spring which is connected to said gage-carriage and to saidknife-carriage, said tension spring being transversely spaced from saidface of said recess to produce said limited turning movement when saidgage-carriage holding means are in holding position and saidknife-carriage is moved away from said gage-carriage.

DAVID N. JUDELSI-ION.l

REFERENCES CITED The following references are of record in the nie oflthis patent:

UNITED STATES PATENTS Number Name Date 1,242,488 Judelshon Oct. 9, 191'11,546,564 Cameron July 21, 1925 1,949,999 Frostad Mar. 6, 1934 2,398,929Forsberg Apr. 23, 1946

